added pkg/filecli/

pkg/filecli/authbas.go

@@ -0,0 +1,20 @@
+package filecli
+
+import (
+	"encoding/base64"
+)
+
+type Authenticator interface {
+	MakeHeader(user, pass string) (key, value string, err error)
+}
+
+type BasicAuthenticator struct{}
+
+func NewBasicAuthenticator() *BasicAuthenticator {
+	return &BasicAuthenticator{}
+}
+
+func (auth *BasicAuthenticator) MakeHeader(user, pass string) (string, string, error) {
+	pair := base64.StdEncoding.EncodeToString([]byte(user + ":" + pass))
+	return "Authorization", "Basic " + pair, nil
+}